Richtek Technology Corporation

Energy Pass, Inc.

Ping-Ching Huang

Li-Wen Fang

Ke-Horng Chen

An-Tung Chen

Ta-Yung Yang

Shih-Wei Wang

Yu-Huei Lee

Chih-Hao Yang

Ming-Wei Lin

Wei-Chuan Wu

Cheng-Kuang Lin

Robert Yung-His Tsu

Wei-Chan Wu

Ching Long Lin

Chih-Wen Hsiao

A control circuit for controlling a stackable multiphase power converter includes: a synchronization terminal; a synchronization signal connected to the synchronization terminals of a plurality of the control circuits in parallel, wherein the synchronization signal includes a plurality of pulses to be successively counted as a count number; and a reset signal, configured to reset and initiate the count number; wherein the control circuit further comprises a phase-sequence number, wherein the control circuit enables a corresponding power stage circuit to generate a phase of the output power when the count number reaches the phase-sequence number.

Control circuit and method for use in stackable multiphase power converter

A scalable multi-phase switching converter includes: converter modules, each including: a loop control unit, which generates a basic trigger pulse according to a feedback signal in master operation mode; and a switching control unit, which determines an operation mode and a corresponding phase serial order according to a setting signal received by a setting pin in a setting mode, and generates a multi-phase trigger pulse signal at a trigger pin according to the basic trigger pulse in master operation mode. The switching control unit receives the multi-phase trigger pulse signal at the trigger pin in slave operation mode. The switching control unit generates an ON-trigger pulse according to the multi-phase trigger pulse signal and the corresponding phase serial order. An ON-period determination unit generates a conduction control pulse according to the ON-trigger pulse to control a corresponding inductor. The trigger pins of the converter modules are coupled to each other.

Scalable multi-phase switching converter and converter module and control method thereof

A control circuit of a switching regulator includes a control pin for coupling with an external resistor; a resistor detecting circuit for detecting a resistance of the external resistor; a current generating module for generating a corresponding control current according to a detection result of the resistor detecting circuit; an oscillating circuit for generating a clock signal; and a mode-switching circuit. When the mode-switching circuit configures the oscillating circuit to operate in a resistor-controlled mode, the oscillating circuit generates the clock signal according to the control current so that the clock signal has a frequency corresponding to the resistance of the external resistor. When the mode-switching circuit configures the oscillating circuit to operate in a signal-controlled mode, the oscillating circuit generates the clock signal according to an external synchronous signal coupled with the control pin so that the clock signal is synchronized with the external synchronous signal.

Switching regulator control circuit with multiple clock frequency setting modes

A current mode buck-boost converter has an input terminal, an output terminal, and an output capacitor coupled to the output terminal. The input terminal is used to receive an input voltage, and the output terminal is for producing the output voltage. The current mode buck-boost converter comprises a voltage converter and a control circuit. The voltage converter comprises an inductor. The control circuit is for detecting the current passing through the inductor to determine the electric energy transmitted to the output terminal by the voltage converter. Accordingly, the current mode buck-boost converter has fast response, and the electrical energy can be recycled and stored to the voltage source when the current mode buck-boost converter operates in down-tracking process.

Current mode buck-boost converter

Growing community of inventors

Taipei, Taiwan

Ping-Ching Huang